YWBL-WH GRV8-04 M460 Voltage Relay, 3-Phase Voltage Monitoring Relay with Phase Sequence and Failure Protection for Industrial Equipment and Control Systems

Specification: Function: Monitor L-L voltage (3-phase 3-wire system) Monitoring terminal: L1-L2-L3 Power: L1-L2 Rated working voltage: 220-230-240-380-400-415-440-460(P-P) Rated power frequency: 45Hz-65Hz Measuring range: 176V-552V Voltage threshold range: 2%-20% (rated voltage) Voltage fixed lag rate: 2% Voltage measurement error: 1% Power-on delay time: 0.5s Knob setting accuracy: 10% Reset time: 1s Temperature fluctuation error: 0.05%/°C, at=20°C Output: 1 × SPDT; 10A/ AC1; 250VAC/24VDC Minimum switching power: 500mW Overvoltage: 2%-20% Undervoltage: -20%-2% Action delay time: 0.1-10s adjustable Phase sequence : Yes Phase failure : Yes Power indicator: Green LED Output relay indication: Red LED Mechanical life: 1×107 Mounting method: 35mm DIN rail mounting Mount altitude: 2000m Weight: Approx. 78g/2.7oz Package list: 1 × Voltage Monitoring Relay

• Precision Voltage Monitoring: GRV8-04 relay supports eight selectable rated voltages from 220V to 460V AC, with measurement accuracy better than 1 percent, enabling stable voltage protection for industrial machinery under fluctuating grid conditions, reducing unplanned downtime in crane and elevator control systems
• Versatile Application Compatibility: GRV8-04 relay integrates seamlessly into tower cranes, elevators, agricultural machinery, and refrigerated trucks, supporting reverse-phase prevention, power switching logic, and dynamic load safeguarding during phase loss, enhancing operational continuity across diverse mobile and fixed equipment
• Clear Visual Status Feedback: GRV8-04 relay uses dedicated green LED for live power indication and red LED for active relay output, delivering immediate at-a-glance diagnostics without tools or software, accelerating troubleshooting in noisy or space-constrained control cabinets
• True RMS Self-Monitoring Capability: GRV8-04 relay continuously measures its own supply voltage using True RMS technology, providing real-time input stability data for predictive maintenance planning, improving long-term reliability in variable-load environments
• Compact DIN Rail Integration: GRV8-04 relay mounts on standard 35mm DIN rail, measures 2.7 inches wide by 3.1 inches high by 2.3 inches deep, weighs 2.8 ounces, fitting tightly in crowded panels while maintaining industrial-grade signal integrity and thermal resilience